Core
Paint Calculator
How many litres of paint do you need? Coats, coverage and wastage, shown honestly.
InteriorOpen Calculator
Interior Calculators
Paint litres and floor tile counts, with wastage and cost.
Quick Answer
The paint calculator gives litres from wall area, coats and coverage. The tile calculator gives the tile count and order area with a 10% wastage allowance. Both show the formula and price the order at dated rates.
Source: IS 1443:1972, Code of Practice for Laying and Fixing of Ceramic Floor and Wall Tiles (Bureau of Indian Standards), checked Jul 2026.
About our interior calculators
Finishing is the stage most often under-budgeted. These calculators turn room dimensions into the units suppliers quote in (litres of paint, square feet of tile) and add the wastage allowance that decides whether you make one trip to the shop or three. Both price the material from a rate you enter, because paint and tile prices vary several-fold by brand.